Results 541 - 550 of 646

• Preventing Injuries Caused by Unrecognized Stone Mine Roof Beam Failures With a Pro-Active Roof Control Plan
  3/1/1999 - Conference papers
  To help mitigate the potential for falls-of-ground injuries to underground stone miners, NIOSH developed the Roof Monitoring Safety System (RMSS) to aid in monitoring dangerous levels of roof beam deflection.
• Coal Mine Subsidence Prediction Using a Boundary-Element Program
  3/1/1999 - Conference papers
  This paper presents several case studies in which a mechanics-based boundary-element program is used to back-calculate the surface subsidence associated with various panels at several northern Appalachian coal mines.
• Comparison of Seismic Tomography, Strain Relief, and Ultrasonic Velocity Measurements to Evaluate Stress in an Underground Pillar
  3/1/1999 - Conference papers
  An investigation of an underground pillar at a mine in Lead, SD. Using the results, researchers hypothesize that pillar rocks have the ability to withstand stress an order of magnitude greater than they currently sustain.
• The State-of-the-Art in Coal Pillar Design
  3/1/1999 - Conference papers
  Recently, powerful design methods have emerged from analysis of large data bases of real-world pillar successes and failures. In the process, our understanding of pillar mechanics has been greatly enriched.
• Investigation of Longwall Face Ventilation Air-Splitting Methods for Improved Dust Control
  3/1/1999 - Conference papers
  Two types of airflow splitting methods for improving longwall dust control were investigated by NIOSH's Pittsburgh Research Laboratory. These methods included a transducer mesh barrier and a staged spray barrier system.
• Thermal Stability of ANFO Made with Recycled Oil
  2/1/1999 - Conference papers
  The NIOSH Pittsburgh Research Laboratory conducted research to determine the safe operating conditions for using recycled (used) lubricating oil from mining equipment as a partial replacement for diesel fuel to make ANFO-type blasting agents.
• Removing Booster Influences From Toxic Fumes
  2/1/1999 - Conference papers
  Investigation of the viability of removing the booster influences when ranking the toxic fumes of non cap-sensitive mining explosives.
• Role of Fault Slip on Mechanisms of Rock Burst Damage, Lucky Friday Mine, Idaho, USA
  1/1/1999 - Conference papers
  Various methods of monitoring slip movements on bedding planes, as well as examination of rock burst damage in stopes, suggest that many rock bursts in the Lucky Friday Mine are closely associated with these movements.
• Pillar Design Issues for Underground Stone Mines
  1/1/1999 - Conference papers
  This paper examines current design practices for stone mines and discusses issues for safe mine layouts so that a rational first approach towards balancing the demands for increased production can be weighed against increased risk to worker safety.
• Neural Network Technology for Strata Strength Characterization
  1/1/1999 - Conference papers
  The process of drilling and bolting the roof is currently one of the most dangerous jobs in underground mining, resulting in about 1,000 accidents with injuries each year in the United States. To increase the safety of underground miners, researchers f...